OBD-II code · Powertrain (generic)
P0B12 Hybrid/EV Battery Pack Current Sensor B Circuit Intermittent/Erratic
The ECM detects a circuit intermittent/erratic fault on the hybrid/ev battery pack current sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0B12?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor connector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Current Sensor B, Wiring Harness, Bms
Related codes
- P0AC3Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/Erratic
- P0B0FHybrid/EV Battery Pack Current Sensor B Circuit Range/Performance
- P0B10Hybrid/EV Battery Pack Current Sensor B Circuit Low
- P0B11Hybrid/EV Battery Pack Current Sensor B Circuit High
- P0B13Hybrid/EV Battery Pack Current Sensor A/B Correlation
- P0B14Hybrid/EV Battery Pack Voltage Sense B Circuit
- P0B15Hybrid/EV Battery Pack Voltage Sense B Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.